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Chevrolet B1596

If customer concern is related to one of the symptoms below, v

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Chevrolet dealer or qualified service facility if there is a radio/infotainment concern or if B1596.86 is stored. Ask them to evaluate the concern using the current GM PIT6393 guidance rather than replacing the radio solely because this code is present.
Confidence95%

Quick answer

For certain 2023–2026 Chevrolet EVs in the U.S., official GM communications identify B1596.86 as a radio-related DTC that can set because of a software anomaly. The bulletin instructs technicians to ignore this DTC in the specified context and not replace the radio solely for it.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does B1596 mean?

For certain 2023–2026 Chevrolet EVs in the U.S., official GM communications identify B1596.86 as a radio-related DTC that can set because of a software anomaly. The bulletin instructs technicians to ignore this DTC in the specified context and not replace the radio solely for it.

2. Technical explanation

The verified evidence specifically identifies the subcode B1596.86—not every possible B1596 variant. GM bulletin PIT6393 revisions state that B1596.86, along with several communication-related DTCs, may set because of a software anomaly. The bulletin says not to replace the radio for these DTCs. The supplied evidence does not establish a complete generic definition for base code B1596.

3. What system is affected?

Radio/infotainment system, based on the official bulletin context.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a severity level.

5. Symptoms you may notice

  • Not yet established by verified evidence. The supplied bulletin excerpts refer to customer concerns and symptoms but do not provide the symptom list.

6. Possible causes

  • For B1596.86 in the bulletin context, a software anomaly is identified as the reason the DTC may set.
  • Other causes are not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Record the complete DTC, including its suffix; the verified bulletin evidence specifically names B1596.86.
  • If service is needed, provide the technician with the NHTSA/GM bulletin reference PIT6393 and the complete stored-code information.
  • Do not assume that base code B1596 without the .86 suffix has the same documented bulletin disposition.

10. Step-by-step troubleshooting

  1. Have a qualified service facility verify whether the stored code is B1596.86 and whether the vehicle falls within the applicable bulletin population.
  2. Have the facility consult the current version of GM bulletin PIT6393. The verified excerpts state that B1596.86 may be set by a software anomaly and that the radio should not be replaced for this DTC.
  3. The supplied evidence notes a caution related to radio software updates involving USB file transfer, but it does not provide enough complete procedure detail for owner-performed instructions.

11. When to contact service

Contact a Chevrolet dealer or qualified service facility if there is a radio/infotainment concern or if B1596.86 is stored. Ask them to evaluate the concern using the current GM PIT6393 guidance rather than replacing the radio solely because this code is present.

12. What the service center may check

  • Confirm the exact DTC suffix; the verified evidence applies specifically to B1596.86.
  • Check applicability to the vehicle model year and U.S. market listed in the bulletin data.
  • Consult current GM service information and the latest PIT6393 revision.
  • Do not replace the radio solely for B1596.86 in the documented software-anomaly context.

13. Possible repair or resolution

  • For the documented B1596.86 condition, the bulletin direction is to ignore the DTC because it may set due to a software anomaly and not replace the radio for that DTC.
  • Any further repair or software-update resolution is not yet established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM PIT6393J, published March 6, 2026; NHTSA manufacturer communication MC-11029962-0001. It states B1596.86 may set due to a software anomaly and says not to replace the radio for this DTC.
  • GM PIT6393H, published December 23, 2025; NHTSA manufacturer communication MC-11026861-0001.
  • GM PIT6393F, published October 23, 2025; NHTSA manufacturer communication MC-11024704-0001.
  • GM PIT6393E, published October 4, 2025; NHTSA manufacturer communication MC-11024438-0001.
  • GM PIT6393D, published October 1, 2025; NHTSA manufacturer communication MC-11023907-0001.
  • GM PIT6393C, published September 15, 2025; NHTSA manufacturer communication MC-11023342-0001.
  • GM PIT6457B, published January 12, 2026; NHTSA manufacturer communication MC-11027686-0001, lists B1596 among radio-related DTC keywords.

16. Recall information

  • Not yet established by verified evidence. The supplied records are manufacturer communications/service bulletins, not recall records.

17. Official manufacturer information

Applicable verified database entries identify U.S. Chevrolet Blazer, Bolt EV, Bolt EUV, and Equinox vehicles from model years 2023–2026. The supplied applicability data includes two overlapping Equinox entries: 2023–2026 and 2024–2026. Official NHTSA-hosted bulletin: https://static.nhtsa.gov/odi/tsbs/2026/MC-11029962-0001.pdf

19. Frequently asked questions

Does B1596.86 mean the radio must be replaced?

No, not in the documented PIT6393 context. The verified bulletin states that B1596.86 may set because of a software anomaly and says not to replace the radio for this DTC.

Does this bulletin apply to every B1596 code?

Not yet established by verified evidence. The supplied bulletin excerpts specifically identify B1596.86.

Is it safe to drive or charge with B1596.86?

Not yet established by verified evidence. The supplied records do not provide driveability or charging guidance.

Which vehicles are listed in the supplied applicability data?

U.S. Chevrolet Blazer, Bolt EV, Bolt EUV, and Equinox vehicles within the listed 2023–2026 model-year ranges.

20. Sources & verification

Verified
Chevrolet B1596: If customer concern is related to one of the symptoms… | EV Diagnostics